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Debt (Details)
3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 31, 2015
4.95% Senior Notes due November 2015
USD ($)
Dec. 31, 2014
4.95% Senior Notes due November 2015
USD ($)
Mar. 31, 2015
5.05% Senior Notes due December 2016
USD ($)
Dec. 31, 2014
5.05% Senior Notes due December 2016
USD ($)
Dec. 31, 2011
5.05% Senior Notes due December 2016
USD ($)
Mar. 31, 2015
5.05% Senior Notes due December 2016
Forecast
Apr. 15, 2015
2.5% Senior Notes due October 2017
Apr. 15, 2015
2.5% Senior Notes due October 2017
Mar. 31, 2015
2.5% Senior Notes due October 2017
USD ($)
Dec. 31, 2014
2.5% Senior Notes due October 2017
USD ($)
Sep. 30, 2012
2.5% Senior Notes due October 2017
USD ($)
Mar. 31, 2015
Eksportfinans Loans due January 2018
USD ($)
subsidiary
Mar. 31, 2015
Eksportfinans Loans due January 2018
NOK
subsidiary
Dec. 31, 2014
Eksportfinans Loans due January 2018
USD ($)
Dec. 31, 2014
Eksportfinans Loans due January 2018
NOK
Mar. 31, 2015
6.00% Senior Notes due March 2018
USD ($)
Dec. 31, 2014
6.00% Senior Notes due March 2018
USD ($)
Mar. 31, 2015
7.375% Senior Notes due April 2018
USD ($)
Dec. 31, 2014
7.375% Senior Notes due April 2018
USD ($)
Mar. 31, 2015
6.50% Senior Notes due November 2020
USD ($)
Dec. 31, 2014
6.50% Senior Notes due November 2020
USD ($)
Mar. 31, 2015
6.375% Senior Notes due December 2021
USD ($)
Dec. 31, 2014
6.375% Senior Notes due December 2021
USD ($)
Dec. 31, 2011
6.375% Senior Notes due December 2021
USD ($)
Mar. 31, 2015
6.375% Senior Notes due December 2021
Forecast
Apr. 15, 2015
3.8% Senior Notes due October 2022
Apr. 15, 2015
3.8% Senior Notes due October 2022
Mar. 31, 2015
3.8% Senior Notes due October 2022
USD ($)
Dec. 31, 2014
3.8% Senior Notes due October 2022
USD ($)
Sep. 30, 2012
3.8% Senior Notes due October 2022
USD ($)
Mar. 31, 2015
7.45% Notes due April 2027
USD ($)
Dec. 31, 2014
7.45% Notes due April 2027
USD ($)
Mar. 31, 2015
8% Debentures due April 2027
USD ($)
Dec. 31, 2014
8% Debentures due April 2027
USD ($)
Mar. 31, 2015
7% Notes due June 2028
USD ($)
Dec. 31, 2014
7% Notes due June 2028
USD ($)
Mar. 31, 2015
Capital lease contract due August 2029
USD ($)
Dec. 31, 2014
Capital lease contract due August 2029
USD ($)
Mar. 31, 2015
7.5% Notes due April 2031
USD ($)
Dec. 31, 2014
7.5% Notes due April 2031
USD ($)
Mar. 31, 2015
6.80% Senior Notes due March 2038
USD ($)
Dec. 31, 2014
6.80% Senior Notes due March 2038
USD ($)
Mar. 31, 2015
7.35% Senior Notes due December 2041
USD ($)
Dec. 31, 2014
7.35% Senior Notes due December 2041
USD ($)
Dec. 31, 2011
7.35% Senior Notes due December 2041
USD ($)
Mar. 31, 2015
7.35% Senior Notes due December 2041
Forecast
Mar. 31, 2015
Five-Year Revolving Credit Facility
USD ($)
Mar. 18, 2015
Five-Year Revolving Credit Facility
Mar. 31, 2015
Five-Year Revolving Credit Facility
USD ($)
Mar. 31, 2015
Five-Year Revolving Credit Facility
Base Rate
Mar. 31, 2015
Five-Year Revolving Credit Facility
Minimum
Mar. 31, 2015
Five-Year Revolving Credit Facility
Minimum
Adjusted LIBOR
Mar. 31, 2015
Five-Year Revolving Credit Facility
Maximum
Mar. 31, 2015
Five-Year Revolving Credit Facility
Maximum
Adjusted LIBOR
Mar. 31, 2015
Transocean Ltd. and Subsidiaries
Long-term debt by current and noncurrent                                                                                                                  
Total debt $ 10,020,000,000us-gaap_LongTermDebt $ 10,092,000,000us-gaap_LongTermDebt $ 896,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue4.95PercentNovember2015Member
$ 898,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue4.95PercentNovember2015Member
$ 1,000,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue5.05PercentDecember2016Member
$ 999,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue5.05PercentDecember2016Member
        $ 749,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue2.5PercentOctober2017Member
$ 748,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue2.5PercentOctober2017Member
  $ 288,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
  $ 369,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
  $ 1,004,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6PercentMarch2018Member
$ 1,001,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6PercentMarch2018Member
$ 247,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.375PercentApril2018Member
$ 247,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.375PercentApril2018Member
$ 921,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.50PercentNovember2020Member
$ 911,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.50PercentNovember2020Member
$ 1,199,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.375PercentDecember2021Member
$ 1,199,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.375PercentDecember2021Member
        $ 746,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue3.8PercentOctober2022Member
$ 745,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue3.8PercentOctober2022Member
  $ 97,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_NotesDue7.45PercentApril2027Member
$ 97,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_NotesDue7.45PercentApril2027Member
$ 57,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_DebenturesDue8PercentApril2027Member
$ 57,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_DebenturesDue8PercentApril2027Member
$ 309,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7PercentJune2028Member
$ 309,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7PercentJune2028Member
$ 609,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_CapitalLeaseContractDueAugust2029Member
$ 615,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_CapitalLeaseContractDueAugust2029Member
$ 599,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_NotesDue7.5PercentApril2031Member
$ 598,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_NotesDue7.5PercentApril2031Member
$ 999,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.80PercentMarch2038Member
$ 999,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.80PercentMarch2038Member
$ 300,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.35PercentDecember2041Member
$ 300,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.35PercentDecember2041Member
                     
Debt due within one year 1,024,000,000us-gaap_LongTermDebtCurrent 1,033,000,000us-gaap_LongTermDebtCurrent 896,000,000us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue4.95PercentNovember2015Member
898,000,000us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue4.95PercentNovember2015Member
                  106,000,000us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
  114,000,000us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
                                            22,000,000us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= rig_CapitalLeaseContractDueAugust2029Member
21,000,000us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= rig_CapitalLeaseContractDueAugust2029Member
                                 
Long-term debt 8,996,000,000us-gaap_LongTermDebtNoncurrent 9,059,000,000us-gaap_LongTermDebtNoncurrent                                                                                                              
Debt instrument interest rate stated percentage     4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue4.95PercentNovember2015Member
  5.05%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue5.05PercentDecember2016Member
    5.55%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue5.05PercentDecember2016Member
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
  3.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue2.5PercentOctober2017Member
2.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue2.5PercentOctober2017Member
            6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6PercentMarch2018Member
  7.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.375PercentApril2018Member
  6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.50PercentNovember2020Member
  6.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.375PercentDecember2021Member
    6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.375PercentDecember2021Member
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
  4.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue3.8PercentOctober2022Member
3.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue3.8PercentOctober2022Member
    7.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_NotesDue7.45PercentApril2027Member
  8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_DebenturesDue8PercentApril2027Member
  7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7PercentJune2028Member
      7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_NotesDue7.5PercentApril2031Member
  6.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.80PercentMarch2038Member
  7.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.35PercentDecember2041Member
    7.85%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.35PercentDecember2041Member
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
                 
Percentage ownership interest in Transocean Inc. by Transocean Ltd.                                                                                                                 100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
/ dei_LegalEntityAxis
= rig_TransoceanLtdAndSubsidiariesMember
Credit facility term                                                                                                     5 years            
Borrowing capacity, maximum                                                                                                 3,000,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
  3,000,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
           
Debt instrument face value             1,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue5.05PercentDecember2016Member
          750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue2.5PercentOctober2017Member
                        1,200,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.375PercentDecember2021Member
          750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue3.8PercentOctober2022Member
                            300,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.35PercentDecember2041Member
                   
Spread on variable rate basis (as a percent)                                                                                                 1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
      1.125%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= rig_AdjustedLIBORMember
  2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= rig_AdjustedLIBORMember
 
Percentage reduction to the calculated variable rate                                                                                                       1.00%rig_DebtInstrumentReductionToCalculatedVariableRatePercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember
         
Commitment fee percentage at period end                                                                                                 0.275%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
0.225%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
    0.15%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
  0.35%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Interest rate increase               0.50%us-gaap_DebtInstrumentInterestRateIncreaseDecrease
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue5.05PercentDecember2016Member
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
0.50%us-gaap_DebtInstrumentInterestRateIncreaseDecrease
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue2.5PercentOctober2017Member
                                  0.50%us-gaap_DebtInstrumentInterestRateIncreaseDecrease
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.375PercentDecember2021Member
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
0.50%us-gaap_DebtInstrumentInterestRateIncreaseDecrease
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue3.8PercentOctober2022Member
                                      0.50%us-gaap_DebtInstrumentInterestRateIncreaseDecrease
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.35PercentDecember2041Member
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
                 
Debt to tangible capitalization ratio                                                                                                         0.6rig_DebtInstrumentCovenantDebtToTangibleCapitalizationRatio
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
  1.0rig_DebtInstrumentCovenantDebtToTangibleCapitalizationRatio
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Credit facility amount outstanding                                                                                                 0us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
  0us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
           
Credit facility available borrowing capacity                                                                                                 3,000,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
  3,000,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
           
Letters of credit issued and outstanding                                                                                                 0us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
  0us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
           
Aggregate principal amount outstanding 9,996,000,000us-gaap_DebtInstrumentCarryingAmount       1,000,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue5.05PercentDecember2016Member
          750,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue2.5PercentOctober2017Member
    290,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
2,300,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
370,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
2,800,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
            1,200,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue6.375PercentDecember2021Member
          750,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue3.8PercentOctober2022Member
                            300,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= rig_SeniorNotesDue7.35PercentDecember2041Member
                       
Number of wholly-owned subsidiaries which are obligors to debt instrument                           1rig_DebtInstrumentNumberOfWhollyOwnedSubsidiariesAsObligorsToDebt
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
1rig_DebtInstrumentNumberOfWhollyOwnedSubsidiariesAsObligorsToDebt
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
                                                                                   
Restricted investments used as security for debt instruments                           $ 290,000,000us-gaap_RestrictedInvestments
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
2,300,000,000us-gaap_RestrictedInvestments
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
$ 370,000,000us-gaap_RestrictedInvestments
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member
2,800,000,000us-gaap_RestrictedInvestments
/ us-gaap_DebtInstrumentAxis
= rig_EksportfinansNotesDue2018Member